Insecticides and methods of using



Patented Sept. 18, 1945 UNITED STATES PATENT OFFICE msscrrcmss am)neurons or USING William A; Knapp, New York, N. Y., assignor to GeneralChemical Company, New York, N. Y.. a corporation of New York I NoDrawing. Application January 24, 1942, Serial No. 428,085

'7 Claims.

which feed on exposed liquids and solids such as the house fly and fruitflies; and insects, such as thrips, which lacerate the epidermis ofplants and suck up the exuding sap.

In accordance with the p e e invention t has been found thatphenoxazines having the general formula: a

possess insecticidal properties against insects of tary materials suchas hydrated lime, diluents,.

sticking, spreading, and wetting agents, etc., commonly used incombination with insecticides. They may be used dispersed in liquids ordispersed in dry form as dusts.

the arsenates for example, to warm-blooded animals.

The inventionwill be ing example: v Phenoxazine was applied in the formof a solution comprising 1 gram of phenoxazlne per 100 cc. of acetone.Each of live apples, the stern and calyx ends of which filled withspraying, was sprayed with between and 2Q cc. of this solution andallowed to dry. At the same time five apples, the stem and calyx ends ofwhich were filled with parafiln, were sprayed with the illustrated bythe followacetone free from phenoxazlne and also allowed The compoundsof the present invention are relatively stable under the usualconditions of use. They possess very low solubility in water and henceare not easily removed from fmit or foliage by rain. The compounds ofthis invention are believed to be relatively harmless, compared with theten apples was then phenoxazine dispersed in a dust WILHAMAKNAPP.

to dry. The calyx ends of the ten apples were then dipped in paraflln tocover the portion of the apples bearing little and no spray and each ofinfested with five freshly hatched codllng moth larvae. After 10 days,the apples were examined to determine the number of larvae surviving. v7

The percentage control expressed as the value of (XY)/X, where x equalsthe percentage survival on the check and Y equals the percentagesurvival on the phenoxazine treated apples, was approximately 93%.

I claim:

1. The method of combatting chewing insects which comprises applyingsect a phe'noxazlne. I

- 2. The method of combatting codling moth larvae which comprisesapplying a phenoxazine to the host.

3. The method of combatting codling moth larvae which comprises applyingphenoxazine to the host.

4. A method of prises subjecting the insects tov the action of acomposition comprising a phenoxazine.

composition comprising phenoxazine.

6. An insecticide comprising a phenoxazine dispersed in a dust carrier.

'1. An insecticide comprising carrier.

paraflin before to the food of the incombatting insects which com- I thecompound

